This is a Vauxhall Cresta PA of 1958/59. Cresta because of "Cresta"-badge on front wing (Velox had the namebadge on rear wing), wider hubcaps, two tone paint. 1958/59 because of small grille. Later models had a much wider one.

Holden FB had trim (and usually contrasting colour) that started under the vertical A-pillar, the moulding of the wheel arch was heavier and continued to the rear under the doors... I'm sure this is a Vauxhall [PA], maybe in a special Australian version.